Title :
Time- and frequency-resolved electrodynamics of germanium nanoantennas for mid-infrared plasmonics
Author :
Michele Ortolani;Marco P. Fischer;Leonetta Baldassarre;Antonio Samarelli;Kevin Gallacher;Jacopo Frigerio;Valeria Giliberti;Emilie Sakat;Christian Schmidt;Alfred Leitenstorfer;Brida Daniele;Giovanni Isella;Douglas J. Paul;Paolo Biagioni
Author_Institution :
Department of Physics, Sapienza University of Rome, Rome, 00185 Italy
Abstract :
We investigate the mid-infrared response of heavily doped germanium films and periodic arrays of nanoantennas by both continuous wave transmission/reflection spectroscopy and ultrafast pump-probe spectroscopy. We compare the data to finite-element modeling electromagnetic simulations of the subwavelength nanostructures. The plasma frequency of the doped or optically activated semiconductor extends in the 1000-2000 cm-1 range thus enabling access to molecular fingerprints.
Keywords :
"Plasmons","Optical pumping","Optical device fabrication","Optical films","Optical reflection"
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on
Electronic_ISBN :
2162-2035
DOI :
10.1109/IRMMW-THz.2015.7327717
